SERVICE MANUAL

You'll never regret buying a FSM.
And don't discount the inerchangeability of FSMs for years of vehicles etc.
'69 Dart and Valiant would be the same mechanically for instance.
And '75 to '76 Darts. Pretty close other than some wiring and slight mechanical differences, they are good to go.
For example, I bought a FSM at an antique store a couple of years ago for a '74 Dodge Van that has a lot of info about the engines, transmissions, setting up gears, tune ups etc. that cross over to a lot of cars of that same year.
(and others).
I bought it and a '76 Chrysler/Plymouth/Dodge FSM for 10 bucks, (I talked him down from 20).
To me that's a smokin' deal, and I have used them lots.
If nothing else, they are good reading!